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After Starting Engine
After starting, the engine may be held at low speed
for a duration between 1 and 25 seconds to allow
engine systems to stabilize. Holding the engine
speed low is controlled by the Electronic Control
Module (ECM). The duration will depend on ambient
temperature, time since last run and other factors.
Note: In ambient temperatures from 0°C to 60°C
(32°F to 140°F), the warm-up time is approximately 3
minutes. In temperatures below 0°C (32°F),
additional warm-up time may be required.
When the engine idles during warm-up, observe the
following conditions:
Do not check the high-pressure fuel lines with the
engine or the starting motor in operation. If you
inspect the engine in operation, always use the
correct inspection procedure to avoid a fluid
penetration hazard. Refer to Operation and
Maintenance Manual, “General hazard Information”.
• Check for any fluid or for any air leaks at idle rpm
and at one-half full rpm (no load on the engine)
before operating the engine under load. This
check may not be possible in some applications.
• Allow the engine to idle for 3 to 5 minutes, or allow
the engine to idle until the water temperature
indicator begins to rise. Check all gauges during
the warm-up period.
Constant speed engines should be allowed to
operate at low idle for 3 minutes before used at
operational speed. If the low idle option is not
available, then operate the engine at operational
speed with no load for 2 minutes.
Note: Gauge readings should be observed and the
data should be recorded frequently while the engine
is operating. Comparing the data over time will help
to determine normal readings for each gauge.
Comparing data over time will also help detect
abnormal operating developments. Significant
changes in the readings should be investigated.
48
SEBU8731-04
Operation Section
After Starting Engine
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